郭浩彬,李敏杰,张陆燕,章银良

• 1:郑州轻工业大学食品与生物工程学院

摘要(Abstract)：

通过美拉德反应修饰藜麦多肽，以期获得抗氧化活性更高的藜麦多肽美拉德产物(QP-MRPs)。通过单因素试验，考察了QP-MRPs对DPPH自由基(DPPH·)和羟基自由基(·OH)的清除能力。运用电子顺磁共振(electron paramagnetic resonance, EPR)波谱技术，更加直接、准确地研究QP-MRPs的抗氧化活性。结果表明，4种糖(核糖、木糖、葡萄糖、果糖)的美拉德产物均有抗氧化活性，核糖、木糖生成的QP-MRPs的DPPH·和·OH清除率较高，选择木糖进行工艺优化。运用均匀试验设计法对条件进行优化，得到最佳工艺条件：肽糖比为1.5∶1,反应pH为10,反应温度为140℃,反应时间为240 min。以优化所得到的最佳条件进行验证试验，QP-MRPs的DPPH·清除率和·OH清除率分别为76.11%和71.57%。使用木糖在最优条件下修饰藜麦多肽，可生产抗氧化活性高的QP-MRPs。

关键词(KeyWords)： 美拉德反应;均匀试验;电子顺磁共振技术;抗氧化活性

Abstract:

Keywords:

基金项目(Foundation): 河南省科技攻关项目(182102110094)

作者(Author): 郭浩彬,李敏杰,张陆燕,章银良

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